{"cik":1395937,"company":{"entity_status":null,"filings":[{"accession":"0001193125-26-332750","document":"sndx-20260630.htm","filed":"2026-08-04","form":"10-Q","items":"","report_date":"2026-06-30"},{"accession":"0001193125-26-332736","document":"sndx-20260804.htm","filed":"2026-08-04","form":"8-K","items":"2.02,9.01","report_date":"2026-08-04"},{"accession":"0001193125-26-302608","document":"sndx-20260714.htm","filed":"2026-07-14","form":"8-K","items":"8.01,9.01","report_date":"2026-07-14"},{"accession":"0001193125-26-299803","document":"xslF345X06/ownership.xml","filed":"2026-07-09","form":"4","items":"","report_date":"2026-07-08"},{"accession":"0001193125-26-269694","document":"xslF345X06/ownership.xml","filed":"2026-06-12","form":"4","items":"","report_date":"2026-06-11"},{"accession":"0001193125-26-266027","document":"d105044d8k.htm","filed":"2026-06-10","form":"8-K","items":"1.01,2.03,3.02,9.01","report_date":"2026-06-10"},{"accession":"0001193125-26-265852","document":"sndx-20260610.htm","filed":"2026-06-10","form":"8-K","items":"5.02,5.07,9.01","report_date":"2026-06-10"},{"accession":"0001193125-26-256458","document":"d65010d8k.htm","filed":"2026-06-04","form":"8-K","items":"1.01,2.03,3.02,8.01,9.01","report_date":"2026-06-03"},{"accession":"0001193125-26-253603","document":"xslF345X06/ownership.xml","filed":"2026-06-02","form":"4","items":"","report_date":"2026-06-01"},{"accession":"0001193125-26-253601","document":"xslF345X06/ownership.xml","filed":"2026-06-02","form":"4","items":"","report_date":"2026-06-01"},{"accession":"0001193125-26-197859","document":"sndx-20260430.htm","filed":"2026-04-30","form":"DEF 14A","items":"","report_date":"2026-04-30"},{"accession":"0001193125-26-197154","document":"sndx-20260331.htm","filed":"2026-04-30","form":"10-Q","items":"","report_date":"2026-03-31"},{"accession":"0001193125-26-197124","document":"sndx-20260430.htm","filed":"2026-04-30","form":"8-K","items":"2.02,9.01","report_date":"2026-04-30"},{"accession":"0001193125-26-076536","document":"sndx-20251231.htm","filed":"2026-02-26","form":"10-K","items":"","report_date":"2025-12-31"},{"accession":"0001193125-26-076522","document":"sndx-20260226.htm","filed":"2026-02-26","form":"8-K","items":"2.02,9.01","report_date":"2026-02-26"},{"accession":"0001193125-26-043814","document":"xslF345X05/ownership.xml","filed":"2026-02-10","form":"4","items":"","report_date":"2026-02-09"},{"accession":"0001193125-26-043813","document":"xslF345X05/ownership.xml","filed":"2026-02-10","form":"4","items":"","report_date":"2026-02-09"},{"accession":"0001193125-26-041500","document":"xslF345X05/ownership.xml","filed":"2026-02-06","form":"4","items":"","report_date":"2026-02-04"},{"accession":"0001193125-26-041497","document":"xslF345X05/ownership.xml","filed":"2026-02-06","form":"4","items":"","report_date":"2026-02-04"},{"accession":"0001193125-26-010486","document":"sndx-20260112.htm","filed":"2026-01-12","form":"8-K","items":"2.02,7.01","report_date":"2026-01-12"},{"accession":"0001193125-25-326961","document":"sndx-20251218.htm","filed":"2025-12-19","form":"8-K","items":"5.03","report_date":"2025-12-18"},{"accession":"0001193125-25-262521","document":"sndx-20250930.htm","filed":"2025-11-03","form":"10-Q","items":"","report_date":"2025-09-30"},{"accession":"0001193125-25-262509","document":"sndx-20251103.htm","filed":"2025-11-03","form":"8-K","items":"2.02,9.01","report_date":"2025-11-03"},{"accession":"0001193125-25-250052","document":"sndx-20251024.htm","filed":"2025-10-24","form":"8-K","items":"8.01,9.01","report_date":"2025-10-24"},{"accession":"0000950170-25-101985","document":"sndx-20250630.htm","filed":"2025-08-04","form":"10-Q","items":"","report_date":"2025-06-30"},{"accession":"0000950170-25-101974","document":"sndx-20250804.htm","filed":"2025-08-04","form":"8-K","items":"2.02,9.01","report_date":"2025-08-04"},{"accession":"0000950170-25-090205","document":"sndx-20250624.htm","filed":"2025-06-26","form":"8-K","items":"5.02","report_date":"2025-06-24"},{"accession":"0000950170-25-073555","document":"sndx-20250512.htm","filed":"2025-05-16","form":"8-K","items":"5.02,7.01,9.01","report_date":"2025-05-12"},{"accession":"0000950170-25-063518","document":"sndx-20250331.htm","filed":"2025-05-05","form":"10-Q","items":"","report_date":"2025-03-31"},{"accession":"0000950170-25-063514","document":"sndx-20250505.htm","filed":"2025-05-05","form":"8-K","items":"2.02,8.01,9.01","report_date":"2025-05-05"},{"accession":"0000950170-25-048472","document":"sndx-20250401.htm","filed":"2025-04-01","form":"DEF 14A","items":"","report_date":"2025-04-01"},{"accession":"0000950170-25-030394","document":"sndx-20241231.htm","filed":"2025-03-03","form":"10-K","items":"","report_date":"2024-12-31"},{"accession":"0000950170-25-030392","document":"sndx-20250303.htm","filed":"2025-03-03","form":"8-K","items":"2.02,8.01,9.01","report_date":"2025-03-03"},{"accession":"0000950170-24-139121","document":"sndx-20241220.htm","filed":"2024-12-20","form":"8-K","items":"5.02","report_date":"2024-12-20"},{"accession":"0002012383-24-004541","document":"us87164f1057_120624.txt","filed":"2024-12-06","form":"SC 13G/A","items":"","report_date":""},{"accession":"0000950170-24-127708","document":"sndx-20241115.htm","filed":"2024-11-18","form":"8-K","items":"8.01,9.01","report_date":"2024-11-15"},{"accession":"0000950170-24-124545","document":"sndx-20241112.htm","filed":"2024-11-12","form":"8-K","items":"8.01,9.01","report_date":"2024-11-12"},{"accession":"0002012383-24-004032","document":"us87164f1057_110824.txt","filed":"2024-11-08","form":"SC 13G/A","items":"","report_date":""},{"accession":"0000902219-24-000479","document":"SEC13G_Filing.htm","filed":"2024-11-08","form":"SC 13G/A","items":"","report_date":""},{"accession":"0000950170-24-121439","document":"sndx-20240930.htm","filed":"2024-11-05","form":"10-Q","items":"","report_date":"2024-09-30"}],"former_names":[],"gleif_parents":[],"headquarters":[],"insiders":[{"accession":"0001193125-26-269694","acquired_disposed":"A","code":"M","date":"2026-06-12","derivative":false,"filed":"2026-06-12","following_shares":"92120.0","form":"4","owners":["Botwood Nicholas A.J."],"plan_10b5_1":false,"price":"13.82","security":"Common Stock","shares":"31235.0"},{"accession":"0001193125-26-269694","acquired_disposed":"D","code":"S","date":"2026-06-12","derivative":false,"filed":"2026-06-12","following_shares":"60885.0","form":"4","owners":["Botwood Nicholas A.J."],"plan_10b5_1":false,"price":"18.14","security":"Common Stock","shares":"31235.0"},{"accession":"0001193125-26-269694","acquired_disposed":"A","code":"M","date":"2026-06-12","derivative":true,"filed":"2026-06-12","following_shares":"0.0","form":"4","owners":["Botwood Nicholas A.J."],"plan_10b5_1":false,"price":"0.0","security":"Stock options (Right to buy)","shares":"31235.0"},{"accession":"0001193125-26-269694","acquired_disposed":"A","code":"M","date":"2026-06-11","derivative":false,"filed":"2026-06-12","following_shares":"95165.0","form":"4","owners":["Botwood Nicholas A.J."],"plan_10b5_1":false,"price":"13.82","security":"Common Stock","shares":"22515.0"},{"accession":"0001193125-26-269694","acquired_disposed":"D","code":"S","date":"2026-06-11","derivative":false,"filed":"2026-06-12","following_shares":"60885.0","form":"4","owners":["Botwood Nicholas A.J."],"plan_10b5_1":false,"price":"18.0","security":"Common Stock","shares":"34280.0"},{"accession":"0001193125-26-269694","acquired_disposed":"A","code":"M","date":"2026-06-11","derivative":true,"filed":"2026-06-12","following_shares":"0.0","form":"4","owners":["Botwood Nicholas A.J."],"plan_10b5_1":false,"price":"0.0","security":"Stock options (Right to buy)","shares":"22515.0"},{"accession":"0001193125-26-253603","acquired_disposed":"D","code":"S","date":"2026-06-01","derivative":false,"filed":"2026-06-02","following_shares":"139252.0","form":"4","owners":["Goldan Keith A."],"plan_10b5_1":false,"price":"18.99","security":"Common Stock","shares":"1177.0"},{"accession":"0001193125-26-253601","acquired_disposed":"D","code":"S","date":"2026-06-01","derivative":false,"filed":"2026-06-02","following_shares":"484843.0","form":"4","owners":["Metzger Michael A"],"plan_10b5_1":false,"price":"18.99","security":"Common Stock","shares":"6847.0"}],"legal_name":null,"lei":null,"lei_status":null,"lei_updated_at":null,"names":[],"parent_exceptions":[],"parents":[],"wikidata_id":null},"research_built_at":"2026-09-08T00:28:31.573928+00:00","sources":[{"coverage":"8005 issuers; up to 32 recent company reports and 8 ownership-change filings per issuer","id":"sec","license":"SEC public-information reuse","license_url":"https://www.sec.gov/about/privacy-information","name":"SEC submissions","retrieved_at":"2026-09-08T00:28:36.996621+00:00","status":"ok","url":"https://www.sec.gov/search-filings/edgar-application-programming-interfaces"},{"coverage":"1611 unambiguous CIK-linked entities; coverage is incomplete","id":"wikidata","license":"CC0-1.0","license_url":"https://www.wikidata.org/wiki/Wikidata:Licensing","name":"Wikidata structured data","retrieved_at":"2026-09-07T20:33:33.971872+00:00","status":"ok","url":"https://www.wikidata.org/"},{"coverage":"1177 checked identities; 0 unavailable records","id":"gleif","license":"CC0-1.0","license_url":"https://www.gleif.org/en/meta/lei-data-terms-of-use","name":"GLEIF legal entity reference data","retrieved_at":"2026-09-07T20:35:11.504394+00:00","status":"ok","url":"https://www.gleif.org/en/lei-data/gleif-api"},{"coverage":"4 selected series; gaps remain missing","id":"fed","license":"Public domain (selected government series)","license_url":"https://www.federalreserve.gov/disclaimer.htm","name":"Federal Reserve Board H.15","retrieved_at":"2026-09-08T00:28:58.131796+00:00","status":"ok","url":"https://www.federalreserve.gov/releases/h15/"},{"coverage":"9 selected series; gaps remain missing","id":"bls","license":"Public domain","license_url":"https://www.bls.gov/opub/copyright-information.htm","name":"Bureau of Labor Statistics","retrieved_at":"2026-09-08T00:28:59.313116+00:00","status":"ok","url":"https://www.bls.gov/developers/"},{"coverage":"2026 Q2: filings in this completed quarter; not a live transaction feed","id":"insiders","license":"SEC public-information reuse","license_url":"https://www.sec.gov/about/privacy-information","name":"SEC insider transactions","retrieved_at":"2026-09-07T20:35:31.647091+00:00","status":"ok","url":"https://www.sec.gov/data-research/sec-markets-data/insider-transactions-data-sets"}]}